Memorex Mlt2022sm User manual

Index of content

1.Speaciﬁ cations ........................................ 2

1.1 TV System ......................................... 2

1.1.1 Introduction .................................. 2

1.1.2 Key Features ............................... 2

1.1.3 System Diagram .......................... 3

1.2 Panel speaciﬁ cations ......................... 3

1.2.1 General spec brief ....................... 3

1.2.2 Optical spec brief ......................... 4

1.3 I/O interface ....................................... 5

1.3.1 Overview ..................................... 5

1.3.2 Video Functionality ...................... 6

1.3.3 Audio Functionality ...................... 6

1.3.4 Top keypad .................................. 6

1.4. Power ............................................... 7

1.4.1 External power supply ................. 7

1.4.2 Power switch ............................... 7

1.4.3 Power state ................................. 7

1.4.4 Working environment .................. 7

1.5. Channel management ...................... 7

1.5.1 Air/CATV ...................................... 7

1.5.2 Close Caption/ Vchip ................... 8

1.5.3 Miscellaneous .............................. 8

1.6. Safety & EMI test .............................. 8

1.6.1 Safety .......................................... 8

1.6.2 EMI .............................................. 8

1.7. Appearance & Carton ....................... 8

1.7.1 LCD TV dimension ..................... 8

1.7.2 Package dimension ..................... 8

1.7.3 Weight ......................................... 9

1.7.4 Packing detail .............................. 9

1.8. Reliability test ................................. 10

1.8.1 Temperature test ....................... 10

1.8.2 Humidity test .............................. 10

1.8.3 Thermal shock test .................... 10

1.8.4 Non Operating Random Vibration Test

(Packaged) ......................................... 10

1.8.5 Packing Drop Test ..................... 10

2.Drawing ................................................. 11

3.Dis-Assembly & Assembly ..................... 13

3.1.Stand .............................................. 13

3.2.Stand bracket ................................. 13

3.3.Back cover ...................................... 13

3.4.Keypad wire .................................... 13

3.5.VGA screws .................................... 14

3.6.I/O and EMI meael screws ............. 14

3.7.EMI metal ....................................... 14

3.8.Front cover ..................................... 14

3.9.Main board ..................................... 15

3.10.Inverter PCB ................................. 15

3.11.Panel high-voltage cables ............ 15

3.12.LCD metal .................................... 15

Pass the cables ..................................... 15

3.13.Top keypad ................................... 16

3.14.Keypad semi kit ﬁ xture ................. 16

3.15.Speakers ...................................... 16

4.FAULT FINDING TREE ......................... 17

Main page of fault ﬁ nding tree ............... 17

Power supply repair ﬂ owchart ............... 18

OSD display repair ﬂ owchart ................. 19

PC mode repair ﬂ owchart ...................... 20

TV mode repair ﬂ owchart ...................... 21

AV, SV and YCbCr/ YPbPr mode repair

ﬂ owchart ................................................ 22

Audio repair ﬂ owchart ............................ 23

5.SDK BOM .............................................. 24

VGA INPUT D_Sub

JACK 3bit

24bit

YCbCr / YPbPr INPUT

Tuner

BOX

VChip

Close Caption

8bit 8bit

Video

Decoder1 De-Interlace

ADC

Decoder

Audio

Processor

A port

B port

RA port

MCU

Video Image

Processor

LVDS

Audio

Amplifier

Headphone

Driver

Keypad & IR

Speaker

Earphone Jack

Circuit Diagram

PANEL

VGA

1.Speaciﬁ cations

1.1 TV System

1.1.1 Introduction

Aplus LM/LT series products are cutting-edge LCD TVs. Basing on advanced image

processing technology and highly integrated circuit design, LM/LT series bring digital

multimedia entertainment from theater to your home. This document is the detail

spec of these optimized LCD TVs. We will deﬁne each sub-system except panel

spec & inspection in detail. Panel spec & inspection standards aren’t included in

main content of this document, see attached ﬁles.

1.1.2 Key Features

■ Ultra wide viewing angle-Super MVA technology

■ Wide viewing angel: Horizontal 160° /Vertical 140° (CR>=10)

■ HDTV Ready supported (480i/480p/1080i/720p)

■ Automatic 3:2 pull-down & 2:2 pull-down detection and recovery

■ 4:3/16:9/Anamorphic/Panorama aspect ratio

■ MTS supported

■ High brightness 450 nits

■ High contrast ratio 450:1

■ Fast response time 16ms

■ VGA (640x480 pixels) resolution

■ Auto-tune image optimization for VGA

■ Automatic VGA display mode detection & switching control

■ 3-D motion adaptive video de-interlace function

■

sRGB compliance allows end-user to experience the same colors as viewed on CRTs

■ Enhanced 3D noise reduction

■ Support YCbCr/YPbPr through VGA port.

■ Smart Theme functions (Rich, Multimedia, Nature, Soft)

■ Sound Theme functions (POP, Classic, Voice, Jazz, Flat)

■ Audio setup functions (L/R Balance, 5 band Equalizer)

■ 3 steps brightness control

■ Easy access top keypad controls (Menu, Volume up/down, CH up/down, Power)

■ Bundled 2W(max) x 2 stereo speaker

■ Built-in audio ampliﬁer (2W×2)

■ Wall-mountable design.

1.Speaciﬁ cations

1.1.3 System Diagram

1.2 Panel speaciﬁcations

1.2.1 General spec brief

VGA INPUT D_Sub

JACK 3bit

24bit

YCbCr / YPbPr INPUT

Tuner

BOX

VChip

Close Caption

8bit 8bit

Video

Decoder1 De-Interlace

ADC

Decoder

Audio

Processor

A port

B port

RA port

MCU

Video Image

Processor

LVDS

Audio

Amplifier

Headphone

Driver

Keypad & IR

Speaker

Earphone Jack

Circuit Diagram

PANEL

VGA

Item Specification Unit

Active Area 408 (H) x 306 (V) (20.1” diagonal) mm

Bezel Opening Area 412 (H) x 310 (V) mm

Driver Element a-si TFT active matrix - -

Pixel Number 640 x R.G.B. x 480 pixel -

Pixel Pitch 0.6375 (H) x 0.6375 (V) mm -

Pixel Arrangement RGB vertical stripe - -

Display Colors 16.7M color -

Display Operation Mode Transmissive mode / Normally white - -

Surface Treatment Anti-reflective coating + Anti-glare coating - -

1.Speaciﬁ cations

1.2.2 Optical spec brief

Item Symbol Condition Min. Typ. Max. Unit Note

Contrast Ratio CR - (450) - - Note(2)

TR - (5) - ms

Response Time TF - (11) - ms Note(3)

Center Luminance of White LCTBD (450) - cd/m2 Note(4)

Average Luminance of White LAVE TBD TBD - cd/m2

White Variation δW- - 1.6 - Note(7)

Cross Talk CT - - 4 % Note(5)

Rx (0.610) (0.640) (0.670) -

Red Ry (0.300) (0.330) (0.360) -

Gx (0.243) (0.273) (0.303) -

Green Gy (0.570) (0.600) (0.630) -

Bx (0.112) (0.142) (0.172) -

Blue By (0.040) (0.070) (0.100) -

Note(6)

Wx 0.255 0.285 0.315 -

White Wy 0.263 0.293 0.323 - 9, 300K

Color

Chromaticity

Color Gamut

θx=0°,θY =0°

Viewing Normal Angle

(75) %

θx+ (80) -

Horizontal θx- (80) -

θY+ (75) -

Viewing

Angle Vertical θY-

CR≥10

(65) -

Deg. Note(1)

Note (1) Definition of Viewing Angle (θx, θy):

Note (2) Definition of Contrast Ratio (CR):

The contrast ratio can be calculated by the following expression.

Contrast Ratio (CR) = L255 / L0

L255: Luminance of gray level 255

L 0: Luminance of gray level 0

CR = CR (5)

CR (X) is corresponding to the Contrast Ratio of the point X at the figure in Note (7).

Note (3) Definition of Response Time (TR, TF):

12 o’clock direction

θy+ = 90º

6 o’clock

θy- = 90º

θx−

θx+

θy- θy+

x- y+

y- x+

Normal

θx = θy = 0º

θX+ = 90º

θX- = 90º

Optical

Response

100%

90%

10%

Gray Level 255

Gray Level 0

Gra

Level 255

ime

TRTF

Note (4) Definition of Luminance of White (LC, LAVE):

Measure the luminance of gray level 255 at center point and 5 points

LC = L (5)

LAVE = [L (1)+ L (2)+ L (3)+ L (4)+ L (5)] / 5

L (x) is corresponding to the luminance of the point X at the figure in Note (7).

Note (5) Definition of Cross Talk (CT):

CT = | YB – YA | / YA× 100 (%)

Where:

YA = Luminance of measured location without gray level 0 pattern (cd/m2)

YB = Luminance of measured location with gray level 0 pattern (cd/m2)

Note (6) Measurement Setup:

The LCD module should be stabilized at given temperature for 30 minutes to avoid abrupt

temperature change during measuring. In order to stabilize the luminance, the measurement

should be executed after lighting Backlight for 30 minutes in a windless room.

ctive Area

YA, U (D/2,W/8)

YA, R (7D/8,W/2)

YA, D (D/2,7W/8)

YA, L (D/8,W/2)

(0, 0)

(

D,W

)

Gray 128

ctive Area

Gray 0

(D/4,W/4)

(3D/4,3W/4)

(

0, 0

)

YB, U (D/2,W/8)

YB, R (7D/8,W/2)

YB, D (D/2,7W/8)

YB, L (D/8,W/2)

(

D,W

)

Gray 128

Photometer

(TOPCON BM-5A)

Field of View

= 2

500 mm

LCD Module

LCD Panel

Center of the Screen

Light Shield Room

(Ambient Luminance < 2 lux)

Gray 0

Note (7) Definition of White Variation (δW):

Measure the luminance of gray level 255 at 5 points

δW = Maximum [L (1), L (2), L (3), L (4), L (5)] / Minimum [L (1), L (2), L (3), L (4), L (5)]

Active Area

Vertical Line

Horizontal Line

: Test Point

X=1 to 5

1 2

3 4

D/4 D/2 3D/4

W/4

W/2

3W/4

Note (4) Definition of Luminance of White (LC, LAVE):

Measure the luminance of gray level 255 at center point and 5 points

LC = L (5)

LAVE = [L (1)+ L (2)+ L (3)+ L (4)+ L (5)] / 5

L (x) is corresponding to the luminance of the point X at the figure in Note (7).

Note (5) Definition of Cross Talk (CT):

CT = | YB – YA | / YA× 100 (%)

Where:

YA = Luminance of measured location without gray level 0 pattern (cd/m2)

YB = Luminance of measured location with gray level 0 pattern (cd/m2)

Note (6) Measurement Setup:

The LCD module should be stabilized at given temperature for 30 minutes to avoid abrupt

temperature change during measuring. In order to stabilize the luminance, the measurement

should be executed after lighting Backlight for 30 minutes in a windless room.

ctive Area

YA, U (D/2,W/8)

YA, R (7D/8,W/2)

YA, D (D/2,7W/8)

YA, L (D/8,W/2)

(0, 0)

(

D,W

)

Gray 128

ctive Area

Gray 0

(D/4,W/4)

(3D/4,3W/4)

(

0, 0

)

YB, U (D/2,W/8)

YB, R (7D/8,W/2)

YB, D (D/2,7W/8)

YB, L (D/8,W/2)

(

D,W

)

Gray 128

Photometer

(TOPCON BM-5A)

Field of View

= 2

500 mm

LCD Module

LCD Panel

Center of the Screen

Light Shield Room

(Ambient Luminance < 2 lux)

Gray 0

1.Speaciﬁ cations

1.3 I/O interface

1.3.1 Overview

RF TV Tuner input Slot x1 ...................................................................................1

Composite video + L / R (RCA) Audio input x1 ....................................................2

S-Video input (Audio shared with Composite input) ............................................3

Component video + L/R (RCA) Audio input x1 (for YCbCr/YPbPr) .....................4

15pin D-Sub VGA + earphone jack Audio input ...................................................5

Earphone Audio output x1 ...................................................................................6

DC input scoket and Power switch ......................................................................7

1.Speaciﬁ cations

1.3.2 Video Functionality

Terminal Type Impedance Audio Connector type Electric Characteristic

RF TV Tuner Input x 1 75 ohm Stereo L/R NTSC

■ AGC: 2.0-Vpp full-scale input, -6dB gain /

0.5Vpp full scale, +6dB gain.

■ Position: Back side

Composite Input x 1 75 ohm Stereo L/R

Video:

RCA (Yellow)

Audio:

RCA (R:Red,L:White)

■ PAL / NTSC auto detect

■ AGC: 2.0-Vpp full-scale input, -6dB gain /

0.5Vpp full scale, +6dB gain

■ Position: Back side

S-Video Input x 1 75 ohm Stereo L/R

Video:

Y/C Mini-Din

Audio:

Shared with Composite

■ PAL / NTSC auto detect

■ AGC: 2.0-Vpp full-scale input, -6dB gain /

0.5Vpp full scale, +6dB gain

■ Position: Back side

■ Shared with Composite

Component Input x 1 75 ohm Stereo L/R

Video:

RCA (Y: Green, Cb: Blue,

Cr: Red)

Audio:

RCA (R: Red, L: White)

■ AGC: 2.0-Vpp full-scale input, -6dB gain

/ 0.5Vpp full scale, +6dB gain for YCbCr

signal.

■ Support YCbCr/YPbPr signal (480i, 480p,

1080i, 720p).

■ Position: Back side

VGA Input x 1 75 ohm Stereo L/R

VGA:

15pin D-Sub (Blue)

Audio:

Earphone 3.5φMini Jack x 1

■ Resolution mode auto detect.

■ RGB 0.7 Vp-p/75Ω, H/V sync 4.0 Vp-p/TTL

Polarity, Composite sync 4.0 Vp-p/TTL

Level, G sync 0.3 Vp-p/75 Ω Negative

Polarity

■ Position: Back side

1.3.3 Audio Functionality

Terminal Type Impedance Audio Connector type Electric Characteristic

Earphone Output x 1 32 ohm Stereo L/R Earphone 3.5φMini Jack

x 1

■ Volume adjustable by OSD.

■ Position: Back side

Speaker Output x 2 45 ohm Stereo L/R RCA x 2 (R:Red,

L:White)

■ Position: left & right hand side

■ Max output power: 2W

Internal

ampliﬁer Output x 1 45 ohm Stereo L/R NA

■ Power: 2W

■ Frequency range: 100Hz ~ 20KHz

■ Position: Internal

1.3.4 Top keypad

Function Description

VOL- Decrease Volume/Left navigation key

MENU a. MENU –Display Main Menu b. ENTER –Conﬁrm Function

VOL+ Increase volume/Right navigation key

POWER Power on or off

CH- Decrease TV channel/Down navigation key

CH+ Increase TV channel/Up navigation key

1.Speaciﬁ cations

1.4. Power

1.4.1 External power supply

Input: 100~240V AC, 50/60 Hz

Output: 12V DC/ 5A

Max power consumption: 60 W

1.4.2 Power switch

Primary main switch

Cut off power directly to make LCD TV shutdown completely.

Locate at the back side of LCD TV.

Standby switch

Turning off LCD panel & chipsets, go to power saving mode.

Locate ate the front keypad of LCD TV.

1.4.3 Power state

TV power on

LED status: Green

Power consumption: Max 60W

TV standby (Logical switch off)

Powered off by keypad or remote controller.

LED status: Red.

Power consumption: < 5 W

VGA standby mode.

LED status: Green

Power consumption: Max 30W

1.4.4 Working environment

Operating power voltage range: 90V ~ 264V AC

Operating temperature: 0oC ~ 40oC

Storage temperature: -10oC ~ 60oC

Operating ambient humidity: 5% ~ 93% RH

Storage humidity: 20% ~ 90% RH

1.5. Channel management

1.5.1 Air/CATV

Manual select Air/CATV for autoscan.

Auto detect IRC/HRC/STD

Build-in program table to accelerate autoscan speed.

1.Speaciﬁ cations

1.5.2 Close Caption/ Vchip

Support CC1/CC2/CC3/CC4/TT1/TT2/TT3/TT4 close option.

Support Vchip class option for TV-Y/ TV-Y7/ TV-G/ TV-PG/ TV-14/ TV-MA

Support Vchip MPAA option for MPAA-G/ MPAA-PG/ MPAA-PG13/ MPAA-R/

MPAA-NC17/ MPAA-X

Vchip default password: 3308

1.5.3 Miscellaneous

Max no of channel: 125

Channel AFT range: +1.0/-1.25MHz

1.6. Safety & EMI test

1.6.1 Safety

UL/cUL

UL60950, Third Edition (2000)

1.6.2 EMI

FCC

FCC Part 15, Subpart B, Class B

ANSI C63.4-2001

1.7. Appearance & Carton

1.7.1 LCD TV dimension (unit: mm)

510.4 (W).× 365 (H) × 183.54 (D) mm

For detail see the following session (2.Drawing).

1.7.2 Package dimension

680 (W) × 495 (H) × 215 (D) mm

1.Speaciﬁ cations

Die Cut

1.7.3 Weight

Net weight: 7 Kg (LCD TV only)

Gross weight: 8 Kg (include LCD TV & accessories)

Measurement: 2.7 CUFT, 0.08 CBM

1.7.4 Packing detail

LCD TV Unit

Accessories:

Power cord

Power adaptor

Remote Controller

Recyclable Battery (for remote controller) AAA x 2

User’s manual

Composite RCA cable (optional)

VGA cable (optional)

VGA audio input cable (optional)

680 mm

215 mm

495 mm

1.Speaciﬁ cations

1.8. Reliability test

Outsourcing tested by "Electronics Testing Center, Taiwan". (See: http://www.etc.org.

tw/default_en.htm)

1.8.1 Temperature test

Operating: 0 and 50oC for 96 hours

Storage: -10oC and 60oC for 96 hours

1.8.2 Humidity test

Operating: 40oC RH=93% for 96 hours

1.8.3 Thermal shock test

Operating: 10 cycles of TA = -10oC to TB = +60oC

Dwell time = exposure time = 30min, 10 cycles.

1.8.4 Non Operating Random Vibration Test (Packaged)

Frequency: 10～200Hz

Acceleration: 1.15gRMS

Time: Bottom 30 minutes, Top, Left, Right, Front, Back 10 minutes.

1.8.5 Packing Drop Test

Height: Corner , Faceand Edge 50 cm

1 Corners – 3 Edges – 6 Faces

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